Bolt-fastening device.



Wilizesses:

PATENTED AUG. 25, 1908.

A. V. BRYCE.

BOLT FASTENING DEVICE.

APPLICATION TILED SEPT.16, 1907.

UNITED STATES PATENT OFFICE.

ANDREW V. BRYCE, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR 'IO INTER STATEMANU- FACTURING COMPANY, OF PITISBURG, PENNSYLVANIA, A CORPORATION OFARIZONA TERRITORY.

BOLT-FASTENING DE VICE.

Specification of Letters Patent.

Patented Aug. 25, 1908.

To all whom it may concern:

Be it known that I, ANDREW V. BRYCE, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Bolt-Fastening Devices, of which the following is a specification, referencebeing had therein to the accompanying drawing.

My invention consists of an improvement in looking or securing devicesfor threaded bolts, adapted to cooperate with one element of anystructure which it is designed to fasten together, in such a manner asto avoid the necessity of the usualnut.

It is designed to simplify and cheapen the construction, avoid the usualnut or any projecting device at the threaded end of the bolt, and toprovide means for securely and positively holding the parts together andprevent ing loosening or movement after being set.

Referring to the drawings: Figure 1 is a face view showing the threadedend of the bolt incorporated with the element to be secured, by means ofmy improvement. Fig. 2 is a horizontal cross sectional view on the lineIV. IV. of Fig. 1.

The invention is designed to utilize any one of several elements, as forinstance fish plate 2 of an ordinary rail joint as shown in Fig. 2 so asto securely hold said fish plate with the opposite fish plate 3 inbinding engagement with the rail 4 by means of bolt 5 having the usualterminal threads 6. The fish plate 2, or any other element to besecured, is recessed to receive the tapered bushings 7, being providedwith inwardly tapering walls 8 preferably terminating in inwardly curvedbases 9, and adapted to receive the tapered bushings 7 having thecorrespondingly tapered faces 10, as clearly shown in Fig. 2.

In the construction shown in Figs. 1 and 2, the recesses for thebushings are in the form of a truncated cone, in cross section andpreferably provided with inwardly extending lugs or abutments 11 at oneor both sides adapted to project inwardly between the bushings, whichare so constructed as to leave a correspondingintervening recess 12 forsuch purpose. A further advantage of the clearance 12 is that in theoperation of tightening the device and drawing the bushings inwardlythey may approach toward each other sufliciently to grip the threads inthe manner for which the construction is designed. To facilitateinsertion and provide the bearing ends with good clearance, the outeredges of the bushings are beveled off as shown in Fig. 1. As thusarranged, the bolt 5 may be screwed into the bushings, resulting indrawing them inwardly against the tapered faces 8 of the receivingsocket, thereby forcing them inwardly around the threads 6, which effectis assisted by means of the inwardly curved base portion 9, so that whenthe bolt is screwed up tight, its head will bear tightly against theouter face of fish plate 3 and fish plate 2 will be correspondinglysecurely held, while the gripping action of the bushings 7 uponthe'threads will absolutely lock the parts together against rotation.

In addition to the great holding power of my improved device, it will beseen that substantially the whole body portion of the bushings iscontained within the fish plate 2, and as stated such construction maybe employed with any other form of mechanism with which the device is tobe incorporated.

It will be understood that the invention may be changed or varied indifferent details or features by the skilled mechanic and applied tovarious uses, but all such changes or. variations are to be consideredas within the scope of the following claims.

What I claim is:

1. The combination with a fixed base pro- I ments projecting into thesocket cavity, of a plurality of bushing sections having interiorthreads and correspondingly tapered outer faces assembled Within saidsocket and having their ends beveled across and adapted to bear againstsaid lugs or abutments, substantially as set forth.

ANDREW V. BRYCE.

Witnesses:

GE-o. B. BLEMING, C. M. CLARKE.

